The prevalence of self-reported gluten sensitivity (SRGS) in irritable bowel syndrome (IBS)in a Brazilian community. A pilot study

Abstract

Background – A significant number of irritable bowel syndrome (IBS) patients report onset of symptoms after ingestion of a specific food, including those containing gluten. NCGS includes both intestinal and extra-intestinal symptoms which are related to the ingestion of gluten containing food-after exclusion of celiac disease (CD) and wheat allergy. The overlap between irritable bowel syndrome (IBS) and NCGS has been described but the knowledge of the etiopathogenesis of this clinical entity is incomplete. In Brazil, data on the prevalence of IBS and its association with food intolerance are scarce. Objective – To study the prevalence of SRGS in a group of volunteers diagnosed with IBS in a Brazilian community. Methods – A total of 400 volunteers over 18 years old were selected from students and staff of the Medical School of the Fluminense Federal University, Brazil. Participants completed a questionnaire divided in basic demographic information (age, sex), evaluation of IBS diagnosis in accordance with the Rome III criteria and self-reported food intolerance, including gluten. Results – Eighty-seven (21.7%) (Group I) [mean age 30.4±12.65 (77.4%) females] fulfilling the Rome III criteria for IBS. Twenty-six (32%) reported gastrointestinal symptoms after ingestion of food in general and 28 (32.1%) after gluten ingestion. Within the 313 volunteers non-IBS (78.2%) (Group II) [mean age 30.6±21.77, 215 (68.2%) females] 66 (21%) and 50 (15.9%) reported gastrointestinal symptoms after ingestion of food in general and gluten respectively. Demographic data (mean age and sex) were not statistically different when we compared the two groups of volunteers (p>0.05). Conclusion – The report of gastrointestinal symptoms after ingestion of food in general and gluten-containing foods were statistically different in the two groups (p<0.05). The interaction between IBS, food intolerance and NCGS needs to be better defined, since the role of diet in IBS and its feeding management is an essential condition for the treatment of most of those patients